Electric bed warmer



March 29 1927. r 1,522,326

A. 'T. LISTER ELECTR I C BED WARMER Filed March: 1. 1926 2Ea1 3 ll FIG- 5 JJVVENTOR. Anson 'T.' Lister A TTORNE Y.

Patented Mar. 29, 1927.

UNITED STATES ANSON T. LISTER. OF WICHITA, KANSAS.

ELECTRIC BED WARNER.

. Application filed March 1, 1826.

My invention relates to an electric warming mechanism.

The object of my invention is to provide an electric warming mechanism to be placed in the bed for warming the feet and foi other analogous purposes.

A further object of my invention is to provide an electrically heated mechanism having a thermostat control.

A still further object of my invention is to employ a standard make of an electric lamp.

These and other objects will hereinafter be more fully explained.

Referring to the drawings:

Fig. 1 is a side view of the mechanism, the housing being partly in section longitudinally for convenience of description.

Fig. 2 is an enlarged longitudinal sectional view through the lamp socket.

Fig. 3 is an end view of Fig. 1.

Fig. 4: is an elevation of the thermostat controlling element as positioned in the heating mechanism, the head being removed for convenience of illustration.

Fig. 5 is an elevation of the head.

Fig. 6 is an edge view of the thermostat, partly in section for convenience of illustration.

The mechanism herein disclosed consists of a tubular housing 1 having a plurality of perforations 2 in the wall thereof. On one end of the housing is a head 3 rigidly attached thereto by means of screws 4. Concentrically positioned in said head is a lamp socket 5, the said socket adapted to receive a lamp 6. On the opposite end of the housing is a head 7 which is attached to the end of the housing by means of screws 8. Concentrically positioned in said head is an aperture 9 functioning as accessible means to a tension screw hereinafter described.

In a standard lamp socket I have placed insulations 10 and 10. Positioned in the insulation 10 is a binding post 11 connect ing with a spring member 12, and in the insulation 10 is a member 13 functioning as a conductor to the lamp contacting at the opposite end of said member as at 14c. The binding post 15 connects with means extending through the insulation grounding the circuit on the socket as at 16. On one side of the socket I have drilled an aperture to receive an insulated pin 17; the said pin having a point 18 adapted to engage between the spring 12 and the member 13 functioning as a switch. The said pin is Serial No. 91,535.

mounted on the end of a bell crank J as at A, the said crank being pivotally supported by ears 20 which are rigidly attached to the lamp socket. On the pin 21 supporting the crank is a spring 22 adapted to tension the bell crank withdrawing the pin 17 from engagement. The opposite end of the crank is provided with a curvature 23 functioning as a seat to receive the end of a rod 24, the opposite end of the rod being pivotally connected to a bar 25; the said bar being pivotally attached to the housing as at B and tensioned by a spring 26; the said spring 26 functions as closing means for the circuit transmitting its power through the rod 24: to the bell crank 19 forcing the pin 17 downward closing the circuit.

Near one end of the housing I have placed a partition 27 which is supported by a plurality of lugs 28 which are staggered being on opposite sides of the partition, said lugs being punched from the wall of the housing. concentrically positioned on the partition and removably supported thereby is a hollow disc thermostat 29 same being partially filled with ether or like substance subject to expansion by heat. On the side of the thermostat and centrally positioned is a pin 30 having a socket in the end thereof. On the opposite side and in axial relation with the first said pin is a pin 30 having a spindle 0n the end thereof adapted to engage loosely in an aperture concentrically positioned in the partition. The screw 31 threadedly engages through the bar 25 as at O, the said screw is provided with a head D having an eye therein by which means proper tension may be acquired between the bar and the thermostat for controlling the desired heat. When the mechanism becomes overheated the thermostat will expand pushing the bar 25 carrying with it the rod 24 releasing the tension on the bell crank and simultaneously the spring 22 will hoist the pin 17 breaking the circuit at which time the lamp is extinguished: and when sufliciently cooled a reaction of the thermostat takes place closing the circuit through the same elements. The closing thereof is actuated by the spring 26 tensioning on the bar 25 which actuates the bell crank by the medium of the rod 24-. forcing the pin downward closing the circuit.

If required at any time to withdraw the lamp the screws 4 are removed then the lamp and head simultaneously may be withdrawn; it will be understood that the bell crank will follow as the rod 24 simply en gages in a curvature and is not rigidly attached thereto. The opposite head is removed in like manner when attention is to be given the thermostat and adjacent cooperative members. The socket has an insulated cord extending to an electric connecting element, and the power may be supplied by a municipal or domestic electric plant or by batteries.

Such modifications may be employed as lie within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In an electric bed warmer, the combination of a perforated housing and a lamp concentrically supported by the end of the housing and positioned axially therein, of a partition spaced a short distance from the opposite end, an annular thermostat having flexible sides and being filled with ether or like substance as reciprocating means for the sides, a screw centrally connected to the thermostat, a pivotally connected bar engaging with the screw, a spring to tension the bar toward the thermostat, a bell crank pivotally connected to the lamp, a rod connecting said bell crank with the free end of the bar as actuating means therefor when energized by the thermostat, contact members in the insulation of the lamp, a pin slidably engaging through the insulation as circuit closing means for the contact memhere, said pin being pivotally connected to the bell crank and actuated thereby, all as, and for the purpose described.

2. In an electric bed warm-er, ol' the kind described, a housing having a partition near one end, a thermostat axially supported by the said partition, a bar pivotally connected to one side of the housing and extending diametrically to the opposite side, ascrew threadedly engaging through said bar with the end thereof engaging centrally with the thermostat, a spring tens'ioning said bar to engage the end of the screw firmly to the side of the thermostat so that the expansion and contraction of the thermostat will cause the pivotally mounted bar to reciprocate, a rod pivotally connected to the free end of said bar, said rod extending longitudinally through the partition and near the side of the housing, an electric socket and lamp axially positioned in the housing and rigidly supported therein, a bell crank pivotally mounted on the socket having one arm laterally extending therefrom, a curvature on the end of said arm, said curvature functioning as a seat for the end of said rod, an arm of the bell crank laterally positioned to the first said arm, a pin pivotally connected to the end of last said arm, a spring at the pivotal point of said crank, said spring actuating tension on the end of the rod and to simultaneously break the circuit in the socket switch mechanism, the said thermostat functioning as temperature controlling means for the heater by the structure shown and described.

ANSON T. LISTER. 

